Roland.O
Roland the Mechanic
The Classic signs of a failing 10R80 transmission include violent jerking, skipped gears and rough shifting between gears 3, 4, and 5. The main causes of these symptoms include: a faulty TCM(transmission control Module) or worn out internal valve body.
If you are a technician or owner grappling with a malfunctioning F-150 transmission then the best place I always advise to start is the Service and Repair Manual. This is a bulletproof way of ensuring that you go about the issue the right way. Troubleshooting and repairing the transmission as per the manufacturer's guideliness. Here is the link to the manual: 2019 Ford F-150 Service and Repair Manual
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